Ryan already has swapped his trademark black sweater vests, which became a superstition for him during Jets games, in exchange for blue sweater vests with the Bills' logo. He told the paper his wife donated all his Jets gear to the Salvation Army in suburban New Jersey.

The popular Ryan, best known for his brash and over-confident ways, spent six seasons as head coach of the Jets, starting in 2009. He was fired on Dec. 29, 2014, following a 4-12 season.